Gas extractor for pumps



Patented Apr. 1 0,` 1928;

' yUNITED 'STA TES PATENT OFFICE.

` HENRY M. GREEN, .OF ANGELES, CALIFORNIA; PACIFIC SOUTHWEST TRUST 6c sAVINGsBANK, ADM'IISTRATQR 0F SAID SIGNOR 'ro o. M. OLEARY.`

HENRY M. GREEN, DECEASED, .AS--

GAS IEx'rmio'ron Fon PUMPS.

Application led J'uly 20, 1925. Serial No. 44,852.

This invention relates to pump intakes and especially to the intakes of deep well pumps where the liquid being drawn is impregnated with gas bubbles minute to large sizes.

When pumping oil wells, natural gas flows.

into the pump intake and when collecting inlarge volumes under thepump valves tends to hold the valves up from the seatsand thereforeprevents any uplift of the oil in the suction pipeor pump anchorso long as the gas bodyjfills the chambers in the pump.

My present invention is designed to first reject as. much of the gas as possible from `the oil passing into the lowermost mouth of the pump, then' to break up such gas-'bubbles as may collect or form in the intake, then to i separate the reduced bubbles from the oil in transit in the intake means and then vent off the 4gas from the intake pipe, back.' to well space outside of the pipe intake line.

In accomplishing this object I employa unit comprising a gas rejector, a gas bubble breaker, a gas vand oil separator, a gas trap, and a vent. According to well conditions a system of the units may be arranged entrain.

An object is to provide means ,for'accomplishing the separation of the gas from the oil without the employment of any movably operative elements and thus provide for simplicity, durability, reliability of action, and adaptability of part replacement.

An object is to provide an organization in which each `ofthe parts is of a simple and substantial character. i

Other objects and advantages will be made manifest in the following specification of an embodiment of apparatus .of the invention illustratedin the accompanying drawing; it being understood that modifications, variations andadaptations may be resorted to within the s irit of the invention and the sco e thereo as it is here claimed.

' igure 1 is a vertical longitudinal section of the apparatus in a well casing. l j

Figure 2 is a plan of a gas vent head.

Figure 3 is a plan of af'oraminous shelf.

Figure 4 is a plan of agas rejector.

Figure 5 is a plan of a fitting plug.

Figure 6 is an elevation of the plug.

A string of the units of this invention is shown attachable tothe bottom of a pump.

barrel or intake B, of any type of pump. Each intake unit comprises a lowerfttmg 2 internally threaded at 3 for a shell 4 and pump which causes the pum having -a shoulder 5 threaded at 6 foran inner tube 7. From the shoulder 5 projects up a neck 8 receiving av ring 9 threaded into a jacket 10.

The fitting 2 may be referred to as a gas rejector. For rejecting gas and allowing oil to flow, down to the space between'the shell 4 and the tube 7, the shoulder 5 has a series of downwardly convergent passageways or ports 2a. Preferably the ports 2a are in the form of inverted cones. Hence when the liquid, as oil, flows down into the ports and approaches the much constricted bottom outlets, the compressive effect of a liquid upon an entrained gas bubble tends to exclude or, more accurately, express the gasv out of the oil stream as it converges toward the outlet of the ports. The rejected gas is therefore free to rise in the well casing or naked hole.

body in the stream flowing up in the apparatus. It is the larger bodies of gas merging, one with another under the valves of a to gas bind. By breaking up the gas bub les that may happen to form in, or enter, the apparatus, a more uniform body of oil stream is obtained for action in the pump, with the obvious advantages of continuous flow.

y The breaker medium 12 may be confined with suitable density between foraminous shelves 13, as of wire fabric, in thejacket 10.

Screwed on the upper end of the jacket is ia tra head having a chamber 14 the top of whic has a series of gas'venting ports 14'* y 4surrounding a central trap nipple 15. This nipple 15 has an annular wall 16 around its lower end, which latter is provided with a gas rejector 17 having constricting inlet ports 18 from the bottom of the pocket formed by the wall 16, to the chamber in the fitting 17, into which the nipple 15 opens for suction. The fitting has a plug bottom 17 which may retain the breaker medium l2 in place.

The function of the Wall 16 is to form an upflow surrounding space in the jacket, and a downow pocket to the second rejector and thus causing a complete reversal of liquid flow over the top or lip of the pocket Wall. This reversal tends to throw the entrained gas bubbles on upwardly in their natural floating characteristic. The act-ion of the second rejector 17 is to further squeeze out the entrained gas.

The gas collecting in the trap head 14 vents out of the small parts 14a and freely rises in the well hole.

The parts includin andbetween the bottom fitting 2, and its anchors 4*?, and the trap head 14, organized, constitute one excluding, breaking, separating` and venting unit. A series of these assembled, en train, or one only, may be attached at its head 14 to a pump intake, or. a barrel B.

Two units are shown (one broken away).

What is claimed is:

Bubble breaking and gas separating means for a well, including a tubular body having an intake screen in its lower end to reduce gas bubbles, a closure on the head of the body having a suction nipple extending down therefrom and having gas escape holes outside of the nipple, and a liquid trap at the bottoni of the nipple having conical inlet ports to express gas from the incoming oil to the nipple.

HENRY M. GREEN. 

